Regeneration and stabilization of dehydrogenation catalyst
    82.
    发明授权
    Regeneration and stabilization of dehydrogenation catalyst 失效
    脱氢催化剂的再生和稳定化

    公开(公告)号:US5695724A

    公开(公告)日:1997-12-09

    申请号:US557088

    申请日:1995-12-05

    Abstract: A method and associated apparatus for regenerating and/or stabilizing catalyst used in dehydrogenation of alkylaromatic hydrocarbons is disclosed. The alkylaromatic hydrocarbon (1) and steam (2) are combined to form feedstream (3) and pass into reactor (50). The ensuing product stream (4) is reheated in heater (52) to restore the heat lost and passed as partially converted reactant stream (5) into second reactor (54) and leaves as stream (6) comprising the dehydrogen product. Restoration and/or stabilization of catalyst is accomplished by an alkali metal compound which is fed into feedstream (2) and/or product stream (5) via supply means (46 and 66), respectively. The amount of alkali metal compound entering the reactor(s) is monitored by means (42 and 62) which may in turn be coupled to activating means (44 and 64) to signal and activate the supply means. This method and apparatus permit the restoration and/or stabilization of the catalyst to be performed without interrupting the dehydrogenation reaction.

    Abstract translation: PCT No.PCT / US94 / 07474 Sec。 371 1995年12月5日第 102(e)日期1995年12月5日PCT提交1994年6月30日PCT公布。 第WO95 / 01947号公报 公开了一种用于烷基芳族烃脱氢中用于再生和/或稳定催化剂的方法和相关装置,1995年1月19日。 将烷基芳族烃(1)和蒸汽(2)组合以形成原料流(3)并进入反应器(50)。 随后的产物流(4)在加热器(52)中再加热以恢复热量的损失,并且作为部分转化的反应物流(5)进入第二反应器(54)并作为包含脱氢产物的流(6)离开。 催化剂的还原和/或稳定通过分别经由供给装置(46和66)进料到进料流(2)和/或产物流(5)中的碱金属化合物来实现。 通过装置(42和62)监测进入反应器的碱金属化合物的量,该装置又可耦合到激活装置(44和64)以发出信号并激活供应装置。 该方法和装置允许催化剂的恢复和/或稳定化而不中断脱氢反应。

    Processes of regenerating Ni catalysts and of preparing Ni catalysts
    84.
    发明授权
    Processes of regenerating Ni catalysts and of preparing Ni catalysts 失效
    再生Ni催化剂和制备Ni催化剂的工艺

    公开(公告)号:US5674796A

    公开(公告)日:1997-10-07

    申请号:US362845

    申请日:1994-12-22

    CPC classification number: B01J38/60 B01J23/94

    Abstract: The present invention relates to processes of regenerating Ni catalysts which had been used in a hydrogenation of unsaturated fatty oil or petroleum resin, which comprise separating the Ni-extracted solution and support by extracting the pretreated Ni catalysts with an acid, preparing support-containing solution by burning the separated support in the flow of air or oxygen diluted with nitrogen at the temperature of 300.degree. to 800.degree. C. for 5 to 15 hours and adding deionized water to the support, preparing a catalyst precursor by dropping the Ni-extracted solution and the mixed solution of a basic compound and a compound with free oxygen in the support-containing solution during agitation so as to keep PH of the solution at 9 to 13, whereby nickel oxide precipitates on the support, carrying out a step consisting of aging, washing, filtering and drying the catalyst precursor, and stabilizing the dried catalyst precursor by reducing with hydrogen and passing in nitrogen diluted with oxygen or an organic material.

    Abstract translation: 本发明涉及用于不饱和脂肪油或石油树脂的氢化中的Ni催化剂的再生方法,其包括用酸萃取预处理的Ni催化剂来分离Ni提取溶液和载体,制备含支撑物的溶液 在300〜800℃的温度下,用空气或氧气稀释的空气或氧气中分离的载体燃烧5〜15小时,并向载体中加入去离子水,通过滴加Ni提取液制备催化剂前体 以及在搅拌期间将碱性化合物和游离氧化合物与载体的溶液混合,以使溶液的PH保持在9〜13,由此氧化镍沉淀在载体上,进行由老化 ,洗涤,过滤和干燥催化剂前体,以及通过用氢还原并通过用氧稀释的氮来稳定干燥的催化剂前体 gen或有机材料。

    Method for the reactivation of spent alumina-supported hydrotreating
catalysts
    90.
    发明授权
    Method for the reactivation of spent alumina-supported hydrotreating catalysts 失效
    废氧化铝负载型加氢处理催化剂再活化方法

    公开(公告)号:US5254513A

    公开(公告)日:1993-10-19

    申请号:US702480

    申请日:1991-05-20

    Abstract: Spent or inactive alumina-supported catalysts removed from a catalytic hydrotreating process and having carbonaceous and metallic deposits thereon are reactivated. After a solvent wash to remove process oils, the spent catalyst is contacted with steam at a temperature of 1000.degree. to about 1250.degree. F. for a period of about 2 to about 5 hours to form a reactivated catalyst suitable for reuse in a catalytic hydrotreating process. Optionally, the steam-treated catalyst can be regenerated by contact with an oxygen-containing gas at a temperature of about 700.degree. to about 900.degree. F. to remove carbon deposits from the catalyst, or, alternatively, the steam-treated catalyst can be acid-leached to remove undesired metals and then contacted with an oxygen-containing gas at an elevated temperature to remove carbon deposits.

    Abstract translation: 从催化加氢处理过程中除去并在其上具有碳质和金属沉积物的废活性氧化铝负载催化剂被再活化。 经过溶剂洗涤以除去加工油后,废催化剂在1000至1250°F的温度下与蒸汽接触约2至约5小时,形成适于在催化加氢处理中再利用的再活化催化剂 处理。 任选地,蒸汽处理的催化剂可以通过在约700°至约900°F的温度下与含氧气体接触来再生,以从催化剂中除去碳沉积物,或者,蒸汽处理的催化剂可以是 酸浸以除去不想要的金属,然后在升高的温度下与含氧气体接触以除去碳沉积物。

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